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Finding the Fourth Proportional to 552.60, 762.40 and 413.21

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Solution

The fourth proportional to 552.60, 762.40 and 413.21 is: 570.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.60 : 762.40 = 413.21 : x
  2. Step 2: Convert to fraction form
    552.60/762.40 = 413.21/x
  3. Step 3: Cross multiply
    552.60x = 762.40 × 413.21
  4. Step 4: Simplify right side
    552.60x = 315,031.30
  5. Step 5: Solve for x
    x = 315,031.30/552.60
  6. Step 6: Final answer
    x = 570.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.